[RFC PATCH v8 0/10] Add external dma support for Synopsys MSHC
Jaehoon Chung
jh80.chung at samsung.com
Thu Oct 1 02:14:51 PDT 2015
Dear, All.
I will apply patch 01-03 at my repository on today.
But i don't know better how i do about other patches relevant to config file.
Best Regards,
Jaehoon Chung
On 09/16/2015 03:40 PM, Shawn Lin wrote:
> Synopsys DesignWare mobile storage host controller supports three
> types of transfer mode: pio, internal dma and external dma. However,
> dw_mmc can only supports pio and internal dma now. Thus some platforms
> using dw-mshc integrated with generic dma can't work in dma mode. So we
> submit this patch to achieve it.
>
> And the config option, CONFIG_MMC_DW_IDMAC, was added by Will Newton
> (commit:f95f3850) for the first version of dw_mmc and never be touched since
> then. At that time dt-bindings hadn't been introduced into dw_mmc yet means
> we should select CONFIG_MMC_DW_IDMAC to enable internal dma mode at compile
> time. Nowadays, device-tree helps us to support a variety of boards with one
> kernel. That's why we need to remove it and decide the transfer mode by reading
> dw_mmc's HCON reg at runtime.
>
> This RFC patch needs lots of ACKs. I know it's hard, but it does need someone
> to make the running.
>
> Patch does the following things:
> - remove CONFIG_MMC_DW_IDMAC config option
> - add bindings for edmac used by synopsys-dw-mshc
> at runtime
> - add edmac support for synopsys-dw-mshc
>
> Patch is based on next of git://git.linaro.org/people/ulf.hansson/mmc
>
> Test emmc throughput on my platform with edmac support and without edmac support(pio only)
> iozone -L64 -S32 -azecwI -+n -r4k -r64k -r128k -s1g -i0 -i1 -i2 -f datafile -Rb out.xls > /mnt/result.txt
> (light cpu loading, Direct IO, fixed line size, all pattern recycle, 1GB data in total)
> ___________________________________________________________
> | external dma mode |
> |-----------------------------------------------------------|
> |blksz | Random Read | Random Write | Seq Read | Seq Write|
> |-----------------------------------------------------------|
> |4kB | 13953kB/s | 8602kB/s | 13672kB/s | 9785kB/s|
> |-----------------------------------------------------------|
> |64kB | 46058kB/s | 24794kB/s | 48058kB/s | 25418kB/s|
> |-----------------------------------------------------------|
> |128kB | 57026kB/s | 35117kB/s | 57375kB/s | 35183kB/s|
> |-----------------------------------------------------------|
> VS
> ___________________________________________________________
> | pio mode |
> |-----------------------------------------------------------|
> |blksz | Random Read | Random Write | Seq Read | Seq Write|
> |-----------------------------------------------------------|
> |4kB | 11720kB/s | 8644kB/s | 11549kB/s | 9624kB/s|
> |-----------------------------------------------------------|
> |64kB | 21869kB/s | 24414kB/s | 22031kB/s | 27986kB/s|
> |-----------------------------------------------------------|
> |128kB | 23718kB/s | 34495kB/s | 24698kB/s | 34637kB/s|
> |-----------------------------------------------------------|
>
>
> Changes in v8:
> - remove trans_mode variable
> - remove unnecessary dma_ops check
> - remove unnecessary comment
> - fix coding style based on latest ulf's next
> - add Acked-by: Jaehoon Chung <jh80.chung at samsung.com>
> for HCON's changes
>
> Changes in v7:
> - rebased on Ulf's next
> - combine condition state
> - elaborate more about DMA_INTERFACE
> - define some macro for DMA_INERFACE value
> - spilt HCON ops' changes into another patch
>
> Changes in v6:
> - add trans_mode condition for IDMAC initialization
> suggested by Heiko
> - re-test my patch on rk3188 platform and update commit msg
> - update performance of pio vs edmac in cover letter
>
> Changes in v5:
> - add the title of cover letter
> - fix typo of comment
> - add macro for reading HCON register
> - add "Acked-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>" for exynos_defconfig patch
> - add "Acked-by: Vineet Gupta <vgupta at synopsys.com>" for axs10x_defconfig patch
> - add "Acked-by: Govindraj Raja <govindraj.raja at imgtec.com>" and
> "Acked-by: Ralf Baechle <ralf at linux-mips.org>" for pistachio_defconfig patch
> - add "Acked-by: Joachim Eastwood <manabian at gmail.com>" for lpc18xx_defconfig patch
> - add "Acked-by: Wei Xu <xuwei5 at hisilicon.com>" for hisi_defconfig patch
> - rebase on "https://github.com/jh80chung/dw-mmc.git tags/dw-mmc-for-ulf-v4.2" for merging easily
>
> Changes in v4:
> - remove "host->trans_mode" and use "host->use_dma" to indicate
> transfer mode.
> - remove all bt-bindings' changes since we don't need new properities.
> - check transfer mode at runtime by reading HCON reg
> - spilt defconfig changes for each sub-architecture
> - fix the title of cover letter
> - reuse some code for reducing code size
>
> Changes in v3:
> - choose transfer mode at runtime
> - remove all CONFIG_MMC_DW_IDMAC config option
> - add supports-idmac property for some platforms
>
> Changes in v2:
> - Fix typo of dev_info msg
> - remove unused dmach from declaration of dw_mci_dma_slave
>
> Shawn Lin (10):
> mmc: dw_mmc: Add external dma interface support
> mmc: dw_mmc: use macro for HCON register operations
> Documentation: synopsys-dw-mshc: add bindings for idmac and edmac
> mips: pistachio_defconfig: remove CONFIG_MMC_DW_IDMAC
> arc: axs10x_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: exynos_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: hisi_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: lpc18xx_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: multi_v7_defconfig: remove CONFIG_MMC_DW_IDMAC
> arm: zx_defconfig: remove CONFIG_MMC_DW_IDMAC
>
> .../devicetree/bindings/mmc/synopsys-dw-mshc.txt | 25 ++
> arch/arc/configs/axs101_defconfig | 1 -
> arch/arc/configs/axs103_defconfig | 1 -
> arch/arc/configs/axs103_smp_defconfig | 1 -
> arch/arm/configs/exynos_defconfig | 1 -
> arch/arm/configs/hisi_defconfig | 1 -
> arch/arm/configs/lpc18xx_defconfig | 1 -
> arch/arm/configs/multi_v7_defconfig | 1 -
> arch/arm/configs/zx_defconfig | 1 -
> arch/mips/configs/pistachio_defconfig | 1 -
> drivers/mmc/host/Kconfig | 11 +-
> drivers/mmc/host/dw_mmc-pltfm.c | 2 +
> drivers/mmc/host/dw_mmc.c | 272 +++++++++++++++++----
> drivers/mmc/host/dw_mmc.h | 9 +
> include/linux/mmc/dw_mmc.h | 23 +-
> 15 files changed, 276 insertions(+), 75 deletions(-)
>
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